cases bomb and vehicle bomb are wildly used in terrorist activities nowadays.Large scale cases bomb and vehicle bomb are the two most destroyable approaches to objects
which would cause badly damage to building and also put people in building in serious danger.This paper presents an introduction of buildings’ response under explosion
and summarizes the damage level in different stand-off distance and the regulations used to decide stand-off distance or blast loads.These material offers a reference for researching techniques of defensing important buildings against explosions.